Combined three-dimensional stretch bending die

The utility model relates to a combined three-dimensional stretch bending die, which belongs to the technical field of stretch bending forming of aluminum alloy sections, and mainly comprises a die body and a limiting mechanism, the die body comprises a bottom plate, a combined three-dimensional module and a positioning seat; the combined three-dimensional module is of an arc structure and is fixedly arranged on the upper surface of the bottom plate; the plurality of positioning seats are uniformly arranged along the inner side of the combined three-dimensional module and are used for propping against the combined three-dimensional module; the positioning seat is angle iron; the limiting mechanism comprises a pressing rod support and a pressure rod, the pressing rod support is mainly composed of a transverse plate and two vertical plates, and the two vertical plates are parallel to each other and are both perpendicular to the upper surface of the transverse plate; one end of the pressure rod is hinged between